20023230331 has 4 divisors (see below), whose sum is σ = 21563478832. Its totient is φ = 18482981832.

The previous prime is 20023230239. The next prime is 20023230379. The reversal of 20023230331 is 13303232002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20023230331 - 2³³ = 11433295739 is a prime.

It is a super-2 number, since 2×20023230331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20023230299 and 20023230308.

It is not an unprimeable number, because it can be changed into a prime (20023230391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770124231 + ... + 770124256.

It is an arithmetic number, because the mean of its divisors is an integer number (5390869708).

Almost surely, 2^20023230331 is an apocalyptic number.

20023230331 is a deficient number, since it is larger than the sum of its proper divisors (1540248501).

20023230331 is a wasteful number, since it uses less digits than its factorization.

20023230331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540248500.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 20023230331 its reverse (13303232002), we get a palindrome (33326462333).

The spelling of 20023230331 in words is "twenty billion, twenty-three million, two hundred thirty thousand, three hundred thirty-one".